a barometric height at sea level is 76 cm of mercury while that at a point on a highland is 74 centimetres of mercury determine the altitude of the point (Take g as (10N/kg) the density of mercury is 13600 kilograms per metre cubic and density of air is 1250 kg per metre cubic ​

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.